没有加载GD图像库,Ubuntu 14.04

My Drupal installations are complaining over missing GD library:

GD library rotate and desaturate effects
The GD library for PHP is missing or outdated. Check the PHP image documentation for information on how to correct this.

However I have installed the gd package with

sudo apt-get install php5-gd

and restarted Apache several times.

It shows over the list of installed packages: Packages:

dpkg -l|grep php
ii  libapache2-mod-php5                 5.5.9+dfsg-1ubuntu4.14              amd64        server-side, HTML-embedded scripting language (Apache 2 module)
ii  php-pear                            5.5.9+dfsg-1ubuntu4.14              all          PEAR - PHP Extension and Application Repository
ii  php5                                5.5.9+dfsg-1ubuntu4.14              all          server-side, HTML-embedded scripting language (metapackage)
ii  php5-cgi                            5.5.9+dfsg-1ubuntu4.14              amd64        server-side, HTML-embedded scripting language (CGI binary)
ii  php5-cli                            5.5.9+dfsg-1ubuntu4.14              amd64        command-line interpreter for the php5 scripting language
ii  php5-common                         5.5.9+dfsg-1ubuntu4.14              amd64        Common files for packages built from the php5 source
ii  php5-gd                             5.5.9+dfsg-1ubuntu4.14              amd64        GD module for php5
ii  php5-json                           1.3.2-2build1                       amd64        JSON module for php5
ii  php5-mysql                          5.5.9+dfsg-1ubuntu4.14              amd64        MySQL module for php5
ii  php5-readline                       5.5.9+dfsg-1ubuntu4.14              amd64        Readline module for php5

When trying to add the library manually to a php.ini file with

extension=ge.so;

I get this warning:

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/ge.so' - /usr/lib/php5/20121212/ge.so: cannot open shared object file: No such file or directory in Unknown on line 0

Server has been installed with Virtualmin GPL

Ubuntu 14.04.3 LTS

PHP version:

PHP 5.5.9-1ubuntu4.14

Any advice very appreciated!